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D. de Man, W. van Lint, A. Garn and C. Henke (eds.) (2010). EAZA Yearbook 2007‐2008. EAZA Executive Office, Amsterdam. www.eaza.net/activities/cp/Pages/yearbook.aspx

Carlsen, F. (2009). European Studbook for the chimpanzee (Pan troglodytes). Copenhagen Zoo, Denmark - DOWNLOAD (pdf-file 4MB)

Bertelsen MF (2007). Squamate anesthesia. In West G, D Heard, and N Caulkett (eds.) Zoo animal and wildlife immobilization and anesthesia. 2007, Blackwell Publishing, Ames, Iowa, USA, pp. 233-245.

Carlsen, F. (2007). European Studbook for the chimpanzee (Pan troglodytes). Copenhagen Zoo, Denmark

Holst B. and L. A. Dickie (2007): How do national and international regulations and policies influence the role of zoos and aquariums in conservation? In Zimmermann A., Hatchwell M., Dickie L. and C. West (eds.) Zoos in 21st Century – Catalysts for Conservation? Cambridge University Press, United Kingdom, pp. 22-33.

Holst, B. and M. Stelvig  (2007): International Studbook, Muskox (Ovibos moschatus). Copenhagen Zoo, Denmark.

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CBSG (IUCN/SSC) (2005) Holst B. & P. Medici (eds.). Lion Tamarin Population and habitat Viability Assessment: Briefing Book. Copenhagen Zoo, 1-152.

Holst, B. & F. Carlsen (2004): International Studbook, Muskox (Ovibos moschatus). Volume II, 2002, Copenhagen Zoo, Denmark.